#include"stdio.h"
int main()
{  unsigned long  x,y,m,n,L,t;
   scanf("%ld%ld%ld%ld%ld",&x,&y,&m,&n,&L);
   if(x<y)
   {  if(m==n) printf("Impossible\n");
      else if(m>n)
	  {  t=(y-x)/(m-n);
         if((float)t==(float)(y-x)/(float)(n-m))     printf("%ld\n",t);
	     else printf("Impossible\n");
	  }
      else if(m<n)
	  {  t=(L+x-y)/(n-m);
         if((float)t==(float)(L+x-y)/(float)(n-m))	  printf("%ld\n",t);
	     else printf("Impossible\n");
	  }
   }
   else if(x>y)
   {  if(m==n) printf("Impossible\n");
      else if(m<n)
	  {  t=(y-x)/(m-n);
         if((float)t==(float)(y-x)/(float)(m-n))     printf("%ld\n",t);
	     else printf("Impossible\n");
	  }
      else if(m>n)
	  {  t=(L-x+y)/(m-n);
         if((float)t==(float)(L-x+y)/(float)(m-n))	  printf("%ld\n",t);
	     else printf("Impossible\n");
	  }
   }
   return 0;
}

• Re:为什么WA？大家帮忙挑错啊！ (942) 20062700 2007-08-09 08:38:46